diff options
| author | Jeremias Maerki <jeremias@apache.org> | 2005-07-25 15:54:20 +0000 |
|---|---|---|
| committer | Jeremias Maerki <jeremias@apache.org> | 2005-07-25 15:54:20 +0000 |
| commit | d57530eed04016c68143a1c01ea5320610e4a169 (patch) | |
| tree | c878aa89092f5a753fd90db22a87f8810254e302 /src/java/org/apache/fop/util | |
| parent | 71e92910e627db28ed5bcff19d4593a7bd284575 (diff) | |
| download | xmlgraphics-fop-d57530eed04016c68143a1c01ea5320610e4a169.tar.gz xmlgraphics-fop-d57530eed04016c68143a1c01ea5320610e4a169.zip | |
Made Service a stand-alone class so it can be reused.
Made XMLHandler discoverable through the Service class.
Moved XMLHandler collection into new XMLHandlerRegistry class.
Adjusted the Renderers and XMLHandler to the above changes.
This should make it easier to write certain FOP extensions. The changes were triggered by my work on the FOP extension for Barcode4J for the FOP Trunk.
git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@225143 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'src/java/org/apache/fop/util')
| -rw-r--r-- | src/java/org/apache/fop/util/Service.java | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/util/Service.java b/src/java/org/apache/fop/util/Service.java new file mode 100644 index 000000000..717b0f47f --- /dev/null +++ b/src/java/org/apache/fop/util/Service.java @@ -0,0 +1,113 @@ +/*
+ * Copyright 1999-2005 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* $Id$ */
+
+package org.apache.fop.util;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.util.Enumeration;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+//code stolen from org.apache.batik.util and modified slightly
+//does what sun.misc.Service probably does, but it cannot be relied on.
+//hopefully will be part of standard jdk sometime.
+
+/**
+ * This class loads services present in the class path.
+ */
+public class Service {
+
+ private static Map providerMap = new java.util.Hashtable();
+
+ public static synchronized Iterator providers(Class cls) {
+ ClassLoader cl = cls.getClassLoader();
+ // null if loaded by bootstrap class loader
+ if (cl == null) {
+ cl = ClassLoader.getSystemClassLoader();
+ }
+ String serviceFile = "META-INF/services/" + cls.getName();
+
+ // log.debug("File: " + serviceFile);
+
+ List lst = (List)providerMap.get(serviceFile);
+ if (lst != null) {
+ return lst.iterator();
+ }
+
+ lst = new java.util.Vector();
+ providerMap.put(serviceFile, lst);
+
+ Enumeration e;
+ try {
+ e = cl.getResources(serviceFile);
+ } catch (IOException ioe) {
+ return lst.iterator();
+ }
+
+ while (e.hasMoreElements()) {
+ try {
+ java.net.URL u = (java.net.URL)e.nextElement();
+ //log.debug("URL: " + u);
+
+ InputStream is = u.openStream();
+ Reader r = new InputStreamReader(is, "UTF-8");
+ BufferedReader br = new BufferedReader(r);
+
+ String line = br.readLine();
+ while (line != null) {
+ try {
+ // First strip any comment...
+ int idx = line.indexOf('#');
+ if (idx != -1) {
+ line = line.substring(0, idx);
+ }
+
+ // Trim whitespace.
+ line = line.trim();
+
+ // If nothing left then loop around...
+ if (line.length() == 0) {
+ line = br.readLine();
+ continue;
+ }
+ // log.debug("Line: " + line);
+
+ // Try and load the class
+ // Object obj = cl.loadClass(line).newInstance();
+ // stick it into our vector...
+ lst.add(line);
+ } catch (Exception ex) {
+ // Just try the next line
+ }
+
+ line = br.readLine();
+ }
+ } catch (Exception ex) {
+ // Just try the next file...
+ }
+
+ }
+ return lst.iterator();
+ }
+
+ }
\ No newline at end of file |